gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-12.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre-stats" } */
   3 double cos (double) __attribute__ ((const));
   4 double sin (double) __attribute__ ((const));
   5 double f(double a)
   6 {
   7   double b;
   8   double c,d;
   9   double (*fp) (double) __attribute__ ((const));
  10   /* Fully redundant call, but we need a phi node to merge the results.  */
  11   if (a < 2.0)
  12     {
  13       fp = sin;
  14       c = fp (a);
  15     }
  16   else
  17     {
  18       c = 1.0;
  19       fp = cos;
  20       c = fp (a);
  21     }
  22   d = fp (a);
  23   return d + c;
  24 }
  25
  26 /* { dg-final { scan-tree-dump-times "Eliminated: 1" 1 "pre"} } */
  27 /* { dg-final { cleanup-tree-dump "pre" } } */